/Engine/Source/Developer/CollectionManager/Public/ICollectionManager.h
Returns the list of child collections of the given collection that are also of the specified share type
void GetChildCollectionNames ( [FName](API\Runtime\Core\UObject\FName) CollectionName, [ECollectionShareType::Type](API\Developer\CollectionManager\ECollectionShareType\Type) ShareType, [ECollectionShareType::Type](API\Developer\CollectionManager\ECollectionShareType\Type) ChildShareType, [TArray](API\Runtime\Core\Containers\TArray)< [FName](API\Runtime\Core\UObject\FName) > & CollectionNames ) const